Not a great photo (too much sun, too much contrast, no fix via Photoshop, but I bleached the shadows, maybe too much). I hope you can pick out the unusual weeping conifer in the foreground. It's a narrow weeping form of Serbian (Picea omorika) called 'Pendula Bruns' that is prized by conifer collectors. The trunk grows upright (so it doesn't need training or support) and the branches have almost no stiffness and hang limply as they gain length and weight. There are many uncommon conifers on the grounds of the Gardens. Like most public gardens it seeks to broaden the palette of plants for gardeners and inspire them to grow new varieties. If I knew that 'Pendula Bruns' would be happy in the summer heat of Iowa, I'd try it. There are good photos of this tree at the web site of Beaver Creek Nursery, which is wholesale but has a retail partner. Click here to see the photos.